/* * Connector creation tool * * Authors: * Michael Wybrow * Abhishek Sharma * Jon A. Cruz * Martin Owens * * Copyright (C) 2005-2008 Michael Wybrow * Copyright (C) 2009 Monash University * Copyright (C) 2012 Authors * * Released under GNU GPL, read the file 'COPYING' for more information * * TODO: * o Show a visual indicator for objects with the 'avoid' property set. * o Allow user to change a object between a path and connector through * the interface. * o Create an interface for setting markers (arrow heads). * o Better distinguish between paths and connectors to prevent problems * in the node tool and paths accidentally being turned into connectors * in the connector tool. Perhaps have a way to convert between. * o Only call libavoid's updateEndPoint as required. Currently we do it * for both endpoints, even if only one is moving. * o Deal sanely with connectors with both endpoints attached to the * same connection point, and drawing of connectors attaching * overlapping shapes (currently tries to adjust connector to be * outside both bounding boxes). * o Fix many special cases related to connectors updating, * e.g., copying a couple of shapes and a connector that are * attached to each other. * e.g., detach connector when it is moved or transformed in * one of the other contexts. * o Cope with shapes whose ids change when they have attached * connectors. * o During dragging motion, gobble up to and use the final motion event. * Gobbling away all duplicates after the current can occasionally result * in the path lagging behind the mouse cursor if it is no longer being * dragged. * o Fix up libavoid's representation after undo actions. It doesn't see * any transform signals and hence doesn't know shapes have moved back to * there earlier positions. * * ---------------------------------------------------------------------------- * * Notes: * * Much of the way connectors work for user-defined points has been * changed so that it no longer defines special attributes to record * the points. Instead it uses single node paths to define points * who are then seperate objects that can be fixed on the canvas, * grouped into objects and take full advantage of all tranform, snap * and align functionality of all other objects. * * I think that the style change between polyline and orthogonal * would be much clearer with two buttons (radio behaviour -- just * one is true). * * The other tools show a label change from "New:" to "Change:" * depending on whether an object is selected. We could consider * this but there may not be space. * * Likewise for the avoid/ignore shapes buttons. These should be * inactive when a shape is not selected in the connector context. * */ #include #include #include #include "connector-context.h" #include "pixmaps/cursor-connector.xpm" #include "xml/node-event-vector.h" #include "xml/repr.h" #include "svg/svg.h" #include "desktop.h" #include "desktop-style.h" #include "desktop-handles.h" #include "document.h" #include "document-undo.h" #include "message-context.h" #include "message-stack.h" #include "selection.h" #include "inkscape.h" #include "preferences.h" #include "sp-path.h" #include "display/sp-canvas.h" #include "display/canvas-bpath.h" #include "display/sodipodi-ctrl.h" #include #include #include "snap.h" #include "knot.h" #include "sp-conn-end.h" #include "sp-conn-end-pair.h" #include "conn-avoid-ref.h" #include "libavoid/vertices.h" #include "libavoid/router.h" #include "context-fns.h" #include "sp-namedview.h" #include "sp-text.h" #include "sp-flowtext.h" #include "display/curve.h" #include "verbs.h" using Inkscape::DocumentUndo; // Stuff borrowed from DrawContext static void spcc_connector_set_initial_point(SPConnectorContext *cc, Geom::Point const p); static void spcc_connector_set_subsequent_point(SPConnectorContext *cc, Geom::Point const p); static void spcc_connector_finish_segment(SPConnectorContext *cc, Geom::Point p); static void spcc_reset_colors(SPConnectorContext *cc); static void spcc_connector_finish(SPConnectorContext *cc); static void spcc_concat_colors_and_flush(SPConnectorContext *cc); static void spcc_flush_white(SPConnectorContext *cc, SPCurve *gc); // Context event handlers static gint connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent); static gint connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent); static gint connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent); static gint connector_handle_key_press(SPConnectorContext *const cc, guint const keyval); static void cc_active_shape_add_knot(SPConnectorContext *cc, SPItem* item); static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item); static void cc_clear_active_knots(SPKnotList k); static void cc_clear_active_shape(SPConnectorContext *cc); static void cc_set_active_conn(SPConnectorContext *cc, SPItem *item); static void cc_clear_active_conn(SPConnectorContext *cc); static bool conn_pt_handle_test(SPConnectorContext *cc, Geom::Point& p, gchar **href); static void cc_select_handle(SPKnot* knot); static void cc_deselect_handle(SPKnot* knot); static bool cc_item_is_shape(SPItem *item); static void cc_connector_rerouting_finish(SPConnectorContext *const cc, Geom::Point *const p); static void shape_event_attr_deleted(Inkscape::XML::Node *repr, Inkscape::XML::Node *child, Inkscape::XML::Node *ref, gpointer data); static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name, gchar const *old_value, gchar const *new_value, bool is_interactive, gpointer data); /*static Geom::Point connector_drag_origin_w(0, 0); static bool connector_within_tolerance = false;*/ static Inkscape::XML::NodeEventVector shape_repr_events = { NULL, /* child_added */ NULL, /* child_added */ shape_event_attr_changed, NULL, /* content_changed */ NULL /* order_changed */ }; static Inkscape::XML::NodeEventVector layer_repr_events = { NULL, /* child_added */ shape_event_attr_deleted, NULL, /* child_added */ NULL, /* content_changed */ NULL /* order_changed */ }; #include "tool-factory.h" namespace { SPEventContext* createConnectorContext() { return new SPConnectorContext(); } bool connectorContextRegistered = ToolFactory::instance().registerObject("/tools/connector", createConnectorContext); } const std::string& SPConnectorContext::getPrefsPath() { return SPConnectorContext::prefsPath; } const std::string SPConnectorContext::prefsPath = "/tools/connector"; SPConnectorContext::SPConnectorContext() : SPEventContext() { this->red_curve = 0; this->isOrthogonal = false; this->c1 = 0; this->red_bpath = 0; this->green_curve = 0; this->selection = 0; this->cl0 = 0; this->cl1 = 0; this->c0 = 0; this->cursor_shape = cursor_connector_xpm; this->hot_x = 1; this->hot_y = 1; this->xp = 0; this->yp = 0; this->red_color = 0xff00007f; this->newconn = NULL; this->newConnRef = NULL; this->curvature = 0.0; this->sel_changed_connection = sigc::connection(); this->active_shape = NULL; this->active_shape_repr = NULL; this->active_shape_layer_repr = NULL; this->active_conn = NULL; this->active_conn_repr = NULL; this->active_handle = NULL; this->selected_handle = NULL; this->clickeditem = NULL; this->clickedhandle = NULL; for (int i = 0; i < 2; ++i) { this->endpt_handle[i] = NULL; this->endpt_handler_id[i] = 0; } this->shref = NULL; this->ehref = NULL; this->npoints = 0; this->state = SP_CONNECTOR_CONTEXT_IDLE; } SPConnectorContext::~SPConnectorContext() { this->sel_changed_connection.disconnect(); for (int i = 0; i < 2; ++i) { if (this->endpt_handle[1]) { g_object_unref(this->endpt_handle[i]); this->endpt_handle[i] = NULL; } } if (this->shref) { g_free(this->shref); this->shref = NULL; } if (this->ehref) { g_free(this->shref); this->shref = NULL; } g_assert( this->newConnRef == NULL ); } void SPConnectorContext::setup() { SPEventContext::setup(); this->selection = sp_desktop_selection(this->desktop); this->sel_changed_connection.disconnect(); this->sel_changed_connection = this->selection->connectChanged( sigc::mem_fun(this, &SPConnectorContext::selection_changed) ); /* Create red bpath */ this->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(this->desktop), NULL); sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(this->red_bpath), this->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT); sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(this->red_bpath), 0x00000000, SP_WIND_RULE_NONZERO); /* Create red curve */ this->red_curve = new SPCurve(); /* Create green curve */ this->green_curve = new SPCurve(); // Notice the initial selection. //cc_selection_changed(this->selection, (gpointer) this); this->selection_changed(this->selection); this->within_tolerance = false; sp_event_context_read(this, "curvature"); sp_event_context_read(this, "orthogonal"); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); if (prefs->getBool("/tools/connector/selcue", 0)) { this->enableSelectionCue(); } // Make sure we see all enter events for canvas items, // even if a mouse button is depressed. this->desktop->canvas->gen_all_enter_events = true; } void SPConnectorContext::set(const Inkscape::Preferences::Entry& val) { /* fixme: Proper error handling for non-numeric data. Use a locale-independent function like * g_ascii_strtod (or a thin wrapper that does the right thing for invalid values inf/nan). */ Glib::ustring name = val.getEntryName(); if (name == "curvature") { this->curvature = val.getDoubleLimited(); // prevents NaN and +/-Inf from messing up } else if (name == "orthogonal") { this->isOrthogonal = val.getBool(); } } void SPConnectorContext::finish() { spcc_connector_finish(this); this->state = SP_CONNECTOR_CONTEXT_IDLE; SPEventContext::finish(); if (this->selection) { this->selection = NULL; } cc_clear_active_shape(this); cc_clear_active_conn(this); // Restore the default event generating behaviour. this->desktop->canvas->gen_all_enter_events = false; } //----------------------------------------------------------------------------- static void cc_clear_active_shape(SPConnectorContext *cc) { if (cc->active_shape == NULL) { return; } g_assert( cc->active_shape_repr ); g_assert( cc->active_shape_layer_repr ); cc->active_shape = NULL; if (cc->active_shape_repr) { sp_repr_remove_listener_by_data(cc->active_shape_repr, cc); Inkscape::GC::release(cc->active_shape_repr); cc->active_shape_repr = NULL; sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc); Inkscape::GC::release(cc->active_shape_layer_repr); cc->active_shape_layer_repr = NULL; } cc_clear_active_knots(cc->knots); } static void cc_clear_active_knots(SPKnotList k) { // Hide the connection points if they exist. if (k.size()) { for (SPKnotList::iterator it = k.begin(); it != k.end(); ++it) { sp_knot_hide(it->first); } } } static void cc_clear_active_conn(SPConnectorContext *cc) { if (cc->active_conn == NULL) { return; } g_assert( cc->active_conn_repr ); cc->active_conn = NULL; if (cc->active_conn_repr) { sp_repr_remove_listener_by_data(cc->active_conn_repr, cc); Inkscape::GC::release(cc->active_conn_repr); cc->active_conn_repr = NULL; } // Hide the endpoint handles. for (int i = 0; i < 2; ++i) { if (cc->endpt_handle[i]) { sp_knot_hide(cc->endpt_handle[i]); } } } static bool conn_pt_handle_test(SPConnectorContext *cc, Geom::Point& p, gchar **href) { if (cc->active_handle && (cc->knots.find(cc->active_handle) != cc->knots.end())) { p = cc->active_handle->pos; *href = g_strdup_printf("#%s", cc->active_handle->owner->getId()); return true; } *href = NULL; return false; } static void cc_select_handle(SPKnot* knot) { knot->setShape(SP_KNOT_SHAPE_SQUARE); knot->setSize(10); knot->setAnchor(SP_ANCHOR_CENTER); knot->setFill(0x0000ffff, 0x0000ffff, 0x0000ffff); sp_knot_update_ctrl(knot); } static void cc_deselect_handle(SPKnot* knot) { knot->setShape(SP_KNOT_SHAPE_SQUARE); knot->setSize(8); knot->setAnchor(SP_ANCHOR_CENTER); knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff); sp_knot_update_ctrl(knot); } gint SPConnectorContext::item_handler(SPItem* item, GdkEvent* event) { gint ret = FALSE; Geom::Point p(event->button.x, event->button.y); switch (event->type) { case GDK_BUTTON_RELEASE: if (event->button.button == 1 && !this->space_panning) { if ((this->state == SP_CONNECTOR_CONTEXT_DRAGGING) && this->within_tolerance) { spcc_reset_colors(this); this->state = SP_CONNECTOR_CONTEXT_IDLE; } if (this->state != SP_CONNECTOR_CONTEXT_IDLE) { // Doing something else like rerouting. break; } // find out clicked item, honoring Alt SPItem *item = sp_event_context_find_item(desktop, p, event->button.state & GDK_MOD1_MASK, FALSE); if (event->button.state & GDK_SHIFT_MASK) { this->selection->toggle(item); } else { this->selection->set(item); /* When selecting a new item, do not allow showing connection points on connectors. (yet?) */ if (item != this->active_shape && !cc_item_is_connector(item)) { cc_set_active_shape(this, item); } } ret = TRUE; } break; case GDK_ENTER_NOTIFY: if (!this->selected_handle) { if (cc_item_is_shape(item)) { cc_set_active_shape(this, item); } ret = TRUE; } break; default: break; } return ret; } gint SPConnectorContext::root_handler(GdkEvent* event) { gint ret = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: ret = connector_handle_button_press(this, event->button); break; case GDK_MOTION_NOTIFY: ret = connector_handle_motion_notify(this, event->motion); break; case GDK_BUTTON_RELEASE: ret = connector_handle_button_release(this, event->button); break; case GDK_KEY_PRESS: ret = connector_handle_key_press(this, get_group0_keyval (&event->key)); break; default: break; } if (!ret) { ret = SPEventContext::root_handler(event); } return ret; } static gint connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent) { Geom::Point const event_w(bevent.x, bevent.y); /* Find desktop coordinates */ Geom::Point p = cc->desktop->w2d(event_w); SPEventContext *event_context = SP_EVENT_CONTEXT(cc); gint ret = FALSE; if ( bevent.button == 1 && !event_context->space_panning ) { SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); if (Inkscape::have_viable_layer(desktop, cc->_message_context) == false) { return TRUE; } Geom::Point const event_w(bevent.x, bevent.y); cc->xp = bevent.x; cc->yp = bevent.y; cc->within_tolerance = true; Geom::Point const event_dt = cc->desktop->w2d(event_w); SnapManager &m = cc->desktop->namedview->snap_manager; switch (cc->state) { case SP_CONNECTOR_CONTEXT_STOP: /* This is allowed, if we just canceled curve */ case SP_CONNECTOR_CONTEXT_IDLE: { if ( cc->npoints == 0 ) { cc_clear_active_conn(cc); SP_EVENT_CONTEXT_DESKTOP(cc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new connector")); /* Set start anchor */ /* Create green anchor */ Geom::Point p = event_dt; // Test whether we clicked on a connection point bool found = conn_pt_handle_test(cc, p, &cc->shref); if (!found) { // This is the first point, so just snap it to the grid // as there's no other points to go off. m.setup(cc->desktop); m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE); m.unSetup(); } spcc_connector_set_initial_point(cc, p); } cc->state = SP_CONNECTOR_CONTEXT_DRAGGING; ret = TRUE; break; } case SP_CONNECTOR_CONTEXT_DRAGGING: { // This is the second click of a connector creation. m.setup(cc->desktop); m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE); m.unSetup(); spcc_connector_set_subsequent_point(cc, p); spcc_connector_finish_segment(cc, p); conn_pt_handle_test(cc, p, &cc->ehref); if (cc->npoints != 0) { spcc_connector_finish(cc); } cc_set_active_conn(cc, cc->newconn); cc->state = SP_CONNECTOR_CONTEXT_IDLE; ret = TRUE; break; } case SP_CONNECTOR_CONTEXT_CLOSE: { g_warning("Button down in CLOSE state"); break; } default: break; } } else if (bevent.button == 3) { if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) { // A context menu is going to be triggered here, // so end the rerouting operation. cc_connector_rerouting_finish(cc, &p); cc->state = SP_CONNECTOR_CONTEXT_IDLE; // Don't set ret to TRUE, so we drop through to the // parent handler which will open the context menu. } else if (cc->npoints != 0) { spcc_connector_finish(cc); cc->state = SP_CONNECTOR_CONTEXT_IDLE; ret = TRUE; } } return ret; } static gint connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent) { gint ret = FALSE; SPEventContext *event_context = SP_EVENT_CONTEXT(cc); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) { // allow middle-button scrolling return FALSE; } Geom::Point const event_w(mevent.x, mevent.y); if (cc->within_tolerance) { cc->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); if ( ( abs( (gint) mevent.x - cc->xp ) < cc->tolerance ) && ( abs( (gint) mevent.y - cc->yp ) < cc->tolerance ) ) { return FALSE; // Do not drag if we're within tolerance from origin. } } // Once the user has moved farther than tolerance from the original location // (indicating they intend to move the object, not click), then always process // the motion notify coordinates as given (no snapping back to origin) cc->within_tolerance = false; SPDesktop *const dt = cc->desktop; /* Find desktop coordinates */ Geom::Point p = dt->w2d(event_w); SnapManager &m = dt->namedview->snap_manager; switch (cc->state) { case SP_CONNECTOR_CONTEXT_DRAGGING: { gobble_motion_events(mevent.state); // This is movement during a connector creation. if ( cc->npoints > 0 ) { m.setup(dt); m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE); m.unSetup(); cc->selection->clear(); spcc_connector_set_subsequent_point(cc, p); ret = TRUE; } break; } case SP_CONNECTOR_CONTEXT_REROUTING: { gobble_motion_events(GDK_BUTTON1_MASK); g_assert( SP_IS_PATH(cc->clickeditem)); m.setup(dt); m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE); m.unSetup(); // Update the hidden path Geom::Affine i2d ( (cc->clickeditem)->i2dt_affine() ); Geom::Affine d2i = i2d.inverse(); SPPath *path = SP_PATH(cc->clickeditem); SPCurve *curve = path->get_curve(); if (cc->clickedhandle == cc->endpt_handle[0]) { Geom::Point o = cc->endpt_handle[1]->pos; curve->stretch_endpoints(p * d2i, o * d2i); } else { Geom::Point o = cc->endpt_handle[0]->pos; curve->stretch_endpoints(o * d2i, p * d2i); } sp_conn_reroute_path_immediate(path); // Copy this to the temporary visible path cc->red_curve = path->get_curve_for_edit(); cc->red_curve->transform(i2d); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve); ret = TRUE; break; } case SP_CONNECTOR_CONTEXT_STOP: /* This is perfectly valid */ break; default: if (!sp_event_context_knot_mouseover(cc)) { m.setup(dt); m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE)); m.unSetup(); } break; } return ret; } static gint connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent) { gint ret = FALSE; SPEventContext *event_context = SP_EVENT_CONTEXT(cc); if ( revent.button == 1 && !event_context->space_panning ) { SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); SPDocument *doc = sp_desktop_document(desktop); SnapManager &m = desktop->namedview->snap_manager; Geom::Point const event_w(revent.x, revent.y); /* Find desktop coordinates */ Geom::Point p = cc->desktop->w2d(event_w); switch (cc->state) { //case SP_CONNECTOR_CONTEXT_POINT: case SP_CONNECTOR_CONTEXT_DRAGGING: { m.setup(desktop); m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE); m.unSetup(); if (cc->within_tolerance) { spcc_connector_finish_segment(cc, p); return TRUE; } // Connector has been created via a drag, end it now. spcc_connector_set_subsequent_point(cc, p); spcc_connector_finish_segment(cc, p); // Test whether we clicked on a connection point conn_pt_handle_test(cc, p, &cc->ehref); if (cc->npoints != 0) { spcc_connector_finish(cc); } cc_set_active_conn(cc, cc->newconn); cc->state = SP_CONNECTOR_CONTEXT_IDLE; break; } case SP_CONNECTOR_CONTEXT_REROUTING: { m.setup(desktop); m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE); m.unSetup(); cc_connector_rerouting_finish(cc, &p); doc->ensureUpToDate(); cc->state = SP_CONNECTOR_CONTEXT_IDLE; return TRUE; break; } case SP_CONNECTOR_CONTEXT_STOP: /* This is allowed, if we just cancelled curve */ break; default: break; } ret = TRUE; } return ret; } static gint connector_handle_key_press(SPConnectorContext *const cc, guint const keyval) { gint ret = FALSE; switch (keyval) { case GDK_KEY_Return: case GDK_KEY_KP_Enter: if (cc->npoints != 0) { spcc_connector_finish(cc); cc->state = SP_CONNECTOR_CONTEXT_IDLE; ret = TRUE; } break; case GDK_KEY_Escape: if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) { SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); SPDocument *doc = sp_desktop_document(desktop); cc_connector_rerouting_finish(cc, NULL); DocumentUndo::undo(doc); cc->state = SP_CONNECTOR_CONTEXT_IDLE; desktop->messageStack()->flash( Inkscape::NORMAL_MESSAGE, _("Connector endpoint drag cancelled.")); ret = TRUE; } else if (cc->npoints != 0) { // if drawing, cancel, otherwise pass it up for deselecting cc->state = SP_CONNECTOR_CONTEXT_STOP; spcc_reset_colors(cc); ret = TRUE; } break; default: break; } return ret; } static void cc_connector_rerouting_finish(SPConnectorContext *const cc, Geom::Point *const p) { SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); SPDocument *doc = sp_desktop_document(desktop); // Clear the temporary path: cc->red_curve->reset(); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL); if (p != NULL) { // Test whether we clicked on a connection point gchar *shape_label; bool found = conn_pt_handle_test(cc, *p, &shape_label); if (found) { if (cc->clickedhandle == cc->endpt_handle[0]) { cc->clickeditem->setAttribute("inkscape:connection-start", shape_label, NULL); } else { cc->clickeditem->setAttribute("inkscape:connection-end", shape_label, NULL); } g_free(shape_label); } } cc->clickeditem->setHidden(false); sp_conn_reroute_path_immediate(SP_PATH(cc->clickeditem)); cc->clickeditem->updateRepr(); DocumentUndo::done(doc, SP_VERB_CONTEXT_CONNECTOR, _("Reroute connector")); cc_set_active_conn(cc, cc->clickeditem); } static void spcc_reset_colors(SPConnectorContext *cc) { /* Red */ cc->red_curve->reset(); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL); cc->green_curve->reset(); cc->npoints = 0; } static void spcc_connector_set_initial_point(SPConnectorContext *const cc, Geom::Point const p) { g_assert( cc->npoints == 0 ); cc->p[0] = p; cc->p[1] = p; cc->npoints = 2; sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL); } static void spcc_connector_set_subsequent_point(SPConnectorContext *const cc, Geom::Point const p) { g_assert( cc->npoints != 0 ); SPDesktop *dt = cc->desktop; Geom::Point o = dt->dt2doc(cc->p[0]); Geom::Point d = dt->dt2doc(p); Avoid::Point src(o[Geom::X], o[Geom::Y]); Avoid::Point dst(d[Geom::X], d[Geom::Y]); if (!cc->newConnRef) { Avoid::Router *router = sp_desktop_document(dt)->router; cc->newConnRef = new Avoid::ConnRef(router); cc->newConnRef->setEndpoint(Avoid::VertID::src, src); if (cc->isOrthogonal) cc->newConnRef->setRoutingType(Avoid::ConnType_Orthogonal); else cc->newConnRef->setRoutingType(Avoid::ConnType_PolyLine); } // Set new endpoint. cc->newConnRef->setEndpoint(Avoid::VertID::tar, dst); // Immediately generate new routes for connector. cc->newConnRef->makePathInvalid(); cc->newConnRef->router()->processTransaction(); // Recreate curve from libavoid route. recreateCurve( cc->red_curve, cc->newConnRef, cc->curvature ); cc->red_curve->transform(dt->doc2dt()); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve); } /** * Concats red, blue and green. * If any anchors are defined, process these, optionally removing curves from white list * Invoke _flush_white to write result back to object. */ static void spcc_concat_colors_and_flush(SPConnectorContext *cc) { SPCurve *c = cc->green_curve; cc->green_curve = new SPCurve(); cc->red_curve->reset(); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL); if (c->is_empty()) { c->unref(); return; } spcc_flush_white(cc, c); c->unref(); } /* * Flushes white curve(s) and additional curve into object * * No cleaning of colored curves - this has to be done by caller * No rereading of white data, so if you cannot rely on ::modified, do it in caller * */ static void spcc_flush_white(SPConnectorContext *cc, SPCurve *gc) { SPCurve *c; if (gc) { c = gc; c->ref(); } else { return; } /* Now we have to go back to item coordinates at last */ c->transform(SP_EVENT_CONTEXT_DESKTOP(cc)->dt2doc()); SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); SPDocument *doc = sp_desktop_document(desktop); Inkscape::XML::Document *xml_doc = doc->getReprDoc(); if ( c && !c->is_empty() ) { /* We actually have something to write */ Inkscape::XML::Node *repr = xml_doc->createElement("svg:path"); /* Set style */ sp_desktop_apply_style_tool(desktop, repr, "/tools/connector", false); gchar *str = sp_svg_write_path( c->get_pathvector() ); g_assert( str != NULL ); repr->setAttribute("d", str); g_free(str); /* Attach repr */ cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr)); cc->newconn->transform = SP_ITEM(desktop->currentLayer())->i2doc_affine().inverse(); bool connection = false; cc->newconn->setAttribute( "inkscape:connector-type", cc->isOrthogonal ? "orthogonal" : "polyline", NULL ); cc->newconn->setAttribute( "inkscape:connector-curvature", Glib::Ascii::dtostr(cc->curvature).c_str(), NULL ); if (cc->shref) { cc->newconn->setAttribute( "inkscape:connection-start", cc->shref, NULL); connection = true; } if (cc->ehref) { cc->newconn->setAttribute( "inkscape:connection-end", cc->ehref, NULL); connection = true; } // Process pending updates. cc->newconn->updateRepr(); doc->ensureUpToDate(); if (connection) { // Adjust endpoints to shape edge. sp_conn_reroute_path_immediate(SP_PATH(cc->newconn)); cc->newconn->updateRepr(); } // Only set the selection after we are finished with creating the attributes of // the connector. Otherwise, the selection change may alter the defaults for // values like curvature in the connector context, preventing subsequent lookup // of their original values. cc->selection->set(repr); Inkscape::GC::release(repr); } c->unref(); DocumentUndo::done(doc, SP_VERB_CONTEXT_CONNECTOR, _("Create connector")); } static void spcc_connector_finish_segment(SPConnectorContext *const cc, Geom::Point const /*p*/) { if (!cc->red_curve->is_empty()) { cc->green_curve->append_continuous(cc->red_curve, 0.0625); cc->p[0] = cc->p[3]; cc->p[1] = cc->p[4]; cc->npoints = 2; cc->red_curve->reset(); } } static void spcc_connector_finish(SPConnectorContext *const cc) { SPDesktop *const desktop = cc->desktop; desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector")); cc->red_curve->reset(); spcc_concat_colors_and_flush(cc); cc->npoints = 0; if (cc->newConnRef) { cc->newConnRef->removeFromGraph(); delete cc->newConnRef; cc->newConnRef = NULL; } } static gboolean cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot) { g_assert (knot != NULL); g_object_ref(knot); SPConnectorContext *cc = SP_CONNECTOR_CONTEXT( knot->desktop->event_context); gboolean consumed = FALSE; gchar const *knot_tip = "Click to join at this point"; switch (event->type) { case GDK_ENTER_NOTIFY: sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE); cc->active_handle = knot; if (knot_tip) { knot->desktop->event_context->defaultMessageContext()->set( Inkscape::NORMAL_MESSAGE, knot_tip); } consumed = TRUE; break; case GDK_LEAVE_NOTIFY: sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE); cc->active_handle = NULL; if (knot_tip) { knot->desktop->event_context->defaultMessageContext()->clear(); } consumed = TRUE; break; default: break; } g_object_unref(knot); return consumed; } static gboolean endpt_handler(SPKnot */*knot*/, GdkEvent *event, SPConnectorContext *cc) { g_assert( SP_IS_CONNECTOR_CONTEXT(cc) ); gboolean consumed = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: g_assert( (cc->active_handle == cc->endpt_handle[0]) || (cc->active_handle == cc->endpt_handle[1]) ); if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) { cc->clickeditem = cc->active_conn; cc->clickedhandle = cc->active_handle; cc_clear_active_conn(cc); cc->state = SP_CONNECTOR_CONTEXT_REROUTING; // Disconnect from attached shape unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1; sp_conn_end_detach(cc->clickeditem, ind); Geom::Point origin; if (cc->clickedhandle == cc->endpt_handle[0]) { origin = cc->endpt_handle[1]->pos; } else { origin = cc->endpt_handle[0]->pos; } // Show the red path for dragging. cc->red_curve = SP_PATH(cc->clickeditem)->get_curve_for_edit(); Geom::Affine i2d = (cc->clickeditem)->i2dt_affine(); cc->red_curve->transform(i2d); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve); cc->clickeditem->setHidden(true); // The rest of the interaction rerouting the connector is // handled by the context root handler. consumed = TRUE; } break; default: break; } return consumed; } static void cc_active_shape_add_knot(SPConnectorContext *cc, SPItem* item) { SPDesktop *desktop = cc->desktop; SPKnot *knot = sp_knot_new(desktop, 0); knot->owner = item; knot->setShape(SP_KNOT_SHAPE_SQUARE); knot->setSize(8); knot->setAnchor(SP_ANCHOR_CENTER); knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff); sp_knot_update_ctrl(knot); // We don't want to use the standard knot handler. g_signal_handler_disconnect(G_OBJECT(knot->item), knot->_event_handler_id); knot->_event_handler_id = 0; g_signal_connect(G_OBJECT(knot->item), "event", G_CALLBACK(cc_generic_knot_handler), knot); sp_knot_set_position(knot, item->avoidRef->getConnectionPointPos() * desktop->doc2dt(), 0); sp_knot_show(knot); cc->knots[knot] = 1; } static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item) { g_assert(item != NULL ); if (cc->active_shape != item) { // The active shape has changed // Rebuild everything cc->active_shape = item; // Remove existing active shape listeners if (cc->active_shape_repr) { sp_repr_remove_listener_by_data(cc->active_shape_repr, cc); Inkscape::GC::release(cc->active_shape_repr); sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc); Inkscape::GC::release(cc->active_shape_layer_repr); } // Listen in case the active shape changes cc->active_shape_repr = item->getRepr(); if (cc->active_shape_repr) { Inkscape::GC::anchor(cc->active_shape_repr); sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc); cc->active_shape_layer_repr = cc->active_shape_repr->parent(); Inkscape::GC::anchor(cc->active_shape_layer_repr); sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc); } cc_clear_active_knots(cc->knots); // The idea here is to try and add a group's children to solidify // connection handling. We react to path objects with only one node. for (SPObject *child = item->firstChild() ; child ; child = child->getNext() ) { if (SP_IS_PATH(child) && SP_PATH(child)->nodesInPath() == 1) { cc_active_shape_add_knot(cc, (SPItem *) child); } } cc_active_shape_add_knot(cc, item); } else { // Ensure the item's connection_points map // has been updated item->document->ensureUpToDate(); } } static void cc_set_active_conn(SPConnectorContext *cc, SPItem *item) { g_assert( SP_IS_PATH(item) ); const SPCurve *curve = SP_PATH(item)->get_curve_reference(); Geom::Affine i2dt = item->i2dt_affine(); if (cc->active_conn == item) { if (curve->is_empty()) { // Connector is invisible because it is clipped to the boundary of // two overlpapping shapes. sp_knot_hide(cc->endpt_handle[0]); sp_knot_hide(cc->endpt_handle[1]); } else { // Just adjust handle positions. Geom::Point startpt = *(curve->first_point()) * i2dt; sp_knot_set_position(cc->endpt_handle[0], startpt, 0); Geom::Point endpt = *(curve->last_point()) * i2dt; sp_knot_set_position(cc->endpt_handle[1], endpt, 0); } return; } cc->active_conn = item; // Remove existing active conn listeners if (cc->active_conn_repr) { sp_repr_remove_listener_by_data(cc->active_conn_repr, cc); Inkscape::GC::release(cc->active_conn_repr); cc->active_conn_repr = NULL; } // Listen in case the active conn changes cc->active_conn_repr = item->getRepr(); if (cc->active_conn_repr) { Inkscape::GC::anchor(cc->active_conn_repr); sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc); } for (int i = 0; i < 2; ++i) { // Create the handle if it doesn't exist if ( cc->endpt_handle[i] == NULL ) { SPKnot *knot = sp_knot_new(cc->desktop, _("Connector endpoint: drag to reroute or connect to new shapes")); knot->setShape(SP_KNOT_SHAPE_SQUARE); knot->setSize(7); knot->setAnchor(SP_ANCHOR_CENTER); knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff); knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff); sp_knot_update_ctrl(knot); // We don't want to use the standard knot handler, // since we don't want this knot to be draggable. g_signal_handler_disconnect(G_OBJECT(knot->item), knot->_event_handler_id); knot->_event_handler_id = 0; g_signal_connect(G_OBJECT(knot->item), "event", G_CALLBACK(cc_generic_knot_handler), knot); cc->endpt_handle[i] = knot; } // Remove any existing handlers if (cc->endpt_handler_id[i]) { g_signal_handlers_disconnect_by_func( G_OBJECT(cc->endpt_handle[i]->item), (void*)G_CALLBACK(endpt_handler), (gpointer) cc ); cc->endpt_handler_id[i] = 0; } // Setup handlers for connector endpoints, this is // is as 'after' so that cc_generic_knot_handler is // triggered first for any endpoint. cc->endpt_handler_id[i] = g_signal_connect_after( G_OBJECT(cc->endpt_handle[i]->item), "event", G_CALLBACK(endpt_handler), cc); } if (curve->is_empty()) { // Connector is invisible because it is clipped to the boundary // of two overlpapping shapes. So, it doesn't need endpoints. return; } Geom::Point startpt = *(curve->first_point()) * i2dt; sp_knot_set_position(cc->endpt_handle[0], startpt, 0); Geom::Point endpt = *(curve->last_point()) * i2dt; sp_knot_set_position(cc->endpt_handle[1], endpt, 0); sp_knot_show(cc->endpt_handle[0]); sp_knot_show(cc->endpt_handle[1]); } void cc_create_connection_point(SPConnectorContext* cc) { if (cc->active_shape && cc->state == SP_CONNECTOR_CONTEXT_IDLE) { if (cc->selected_handle) { cc_deselect_handle( cc->selected_handle ); } SPKnot *knot = sp_knot_new(cc->desktop, 0); // We do not process events on this knot. g_signal_handler_disconnect(G_OBJECT(knot->item), knot->_event_handler_id); knot->_event_handler_id = 0; cc_select_handle( knot ); cc->selected_handle = knot; sp_knot_show(cc->selected_handle); cc->state = SP_CONNECTOR_CONTEXT_NEWCONNPOINT; } } static bool cc_item_is_shape(SPItem *item) { if (SP_IS_PATH(item)) { const SPCurve * curve = (SP_SHAPE(item))->_curve; if ( curve && !(curve->is_closed()) ) { // Open paths are connectors. return false; } } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) { Inkscape::Preferences *prefs = Inkscape::Preferences::get(); if (prefs->getBool("/tools/connector/ignoretext", true)) { // Don't count text as a shape we can connect connector to. return false; } } return true; } bool cc_item_is_connector(SPItem *item) { if (SP_IS_PATH(item)) { bool closed = SP_PATH(item)->get_curve_reference()->is_closed(); if (SP_PATH(item)->connEndPair.isAutoRoutingConn() && !closed) { // To be considered a connector, an object must be a non-closed // path that is marked with a "inkscape:connector-type" attribute. return true; } } return false; } void cc_selection_set_avoid(bool const set_avoid) { SPDesktop *desktop = inkscape_active_desktop(); if (desktop == NULL) { return; } SPDocument *document = sp_desktop_document(desktop); Inkscape::Selection *selection = sp_desktop_selection(desktop); GSList *l = const_cast(selection->itemList()); int changes = 0; while (l) { SPItem *item = SP_ITEM(l->data); char const *value = (set_avoid) ? "true" : NULL; if (cc_item_is_shape(item)) { item->setAttribute("inkscape:connector-avoid", value, NULL); item->avoidRef->handleSettingChange(); changes++; } l = l->next; } if (changes == 0) { desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select at least one non-connector object.")); return; } char *event_desc = (set_avoid) ? _("Make connectors avoid selected objects") : _("Make connectors ignore selected objects"); DocumentUndo::done(document, SP_VERB_CONTEXT_CONNECTOR, event_desc); } void SPConnectorContext::selection_changed(Inkscape::Selection *selection) { SPItem *item = selection->singleItem(); if (this->active_conn == item) { // Nothing to change. return; } if (item == NULL) { cc_clear_active_conn(this); return; } if (cc_item_is_connector(item)) { cc_set_active_conn(this, item); } } static void shape_event_attr_deleted(Inkscape::XML::Node */*repr*/, Inkscape::XML::Node *child, Inkscape::XML::Node */*ref*/, gpointer data) { g_assert(data); SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data); if (child == cc->active_shape_repr) { // The active shape has been deleted. Clear active shape. cc_clear_active_shape(cc); } } static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name, gchar const */*old_value*/, gchar const */*new_value*/, bool /*is_interactive*/, gpointer data) { g_assert(data); SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data); // Look for changes that result in onscreen movement. if (!strcmp(name, "d") || !strcmp(name, "x") || !strcmp(name, "y") || !strcmp(name, "width") || !strcmp(name, "height") || !strcmp(name, "transform")) { if (repr == cc->active_shape_repr) { // Active shape has moved. Clear active shape. cc_clear_active_shape(cc); } else if (repr == cc->active_conn_repr) { // The active conn has been moved. // Set it again, which just sets new handle positions. cc_set_active_conn(cc, cc->active_conn); } } } /* Local Variables: mode:c++ c-file-style:"stroustrup" c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) indent-tabs-mode:nil fill-column:99 End: */ // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :